How do I Start a Gamestop or my own business

Gamestop is not a franchise. You can get a job there and move your way up in the company... or apply for their corporate office. Otherwise your question should just be, "How do I start my own video game business>"

He did say OR my Own business?

You might be interested in this

Gamestop.com - Affiliate Program

Do you already have a business plan for your business? That would be the first thing that you would formulate.

If you would click on the following search, Online Business Plans - Google Search you probably would be able to find a business plan on one of the sites there that you could tailor to be your own.